Albert Marth discovered NGC 7587 = m 558 on 5 Oct 1864 and noted "vF, vS, lE, gbM." His position is accurate.

400/500mm - 17.5" (10/28/89): faint, fairly small, very elongated NW-SE, weak concentration. Forms a close pair with CGCG 406-051 0.9' S. The companion is extremely faint and small, round. At z = .029, this galaxy is twice the redshift of the main members of Pegasus I, so perhaps is a member of the Pegasus II cluster.

600/800mm - 24" (9/30/16): moderately to fairly bright, very elongated 3:1 NW-SE, ~50"x18", high surface brightness, small bright core. A mag 11 star is 2.5' NE. Forms a close pair with CGCG 406-051 [51" between centers]. The companion appeared very faint, small, elongated 2:1 SW-NE, 20"x10".

Notes by Steve Gottlieb